Mold cooling apparatus



N. M. WATERBU RY ET AL MOLD COOLING AFPARATUS June 18, 1946.

June 18, 1946. N,IM, wATERBuRY ET AL 2,402,475

MOLD COOLING APPARATUS Filed May 20, 1945 3 Sheets-Sheet 5 Y J/EJL Patented June 18,1946

MOLD COOLING APPARATUS Nell M. Waterbury and Rogelc. Tittel, Alton,

111., assignors to Owens-Illinois Glass Company, a corporation of Ohio Application May 20. 1943, Serial No. 487,709

4 Claims.

Our invention relates to means for cooling and regulating the temperature of molds. In the form herein illustrated and described, the invenjtipn is particularly adapted for cooling blank molds such as are used on an Owens type of suction gathering machine for forming hollow glassware.

An object of the invention is to providean improved means for blowing cooling air continuously and at a high velocity against the exterior surfaces of the molds.

The invention provides a novel construction and arrangement of the blowers by which the cooling air is applied to the exterior surfaces of the mold and by which application of the cooling air to the mold surfaces which contact with the glass is avoided. An object of the invention as embodied in such construction and arrangement is to reduce to a minimum, the temperature changes which occur in the molding face of the blank mold, while extracting heat from the mold in an emcient manner.

' A further feature of the invention relates to the provision of means by which air supplied under comparatively low pressure may b applied continuously and at a highvelocity to the mold surfaces in the formof a multiplicity of jets distributed over the surface to be cooled.

Other objects of the invention will appear hereinafter.

Referring to the accompanying drawings which illustrate the invention as adapted for cooling the blank or parison-forming mold of an Owens type suction gathering machine for making hollow glass articles:

Fig. 1 is a. plan view of a blank mold and the associated cooling mechanism.

Fig. 2 is a front elevation of the same with parts broken away.

Fig. 3 is a section at the line 3-3 on Fig. 1 showing the blower for applying cooling air to the lower end of an open mold section.

Fig. 4 is a part-sectional elevation showin a blower, the section being taken at the line 4-4 on Fig. 1.

Fig. 5'is a plan. view of the blower detached from the mold arm.

Fig. 6 is an elevation of the parts shown in Fig. 4.

Fig. '7 is a section at the line 1-1 on Fig. 6.

Fig. 8 is an elevation of an air distributing and blowing cylinder or nozzle.

Fig. 9 is a section at the line 3-9 on Fig. 8.

Fig, 10 is a bottom plan view of the nozzle or distributor.

Fig. 11 is a composite view, partly diagrammatic, showing the nozzles in section in different positions of adjustment.

Referring to the drawings, Figs. 1 and 2 illustrate a plural cavity blank mold of an Owens ma- 2 chine for gathering charges of molten glass by suction and formingv parisons which/are later I transferred to a finishing mold and blown to finished form therein. The blank mold l5 comprises partible sections formed with mold cavities it. The mold sections are carried by arms l3 which are mounted to swing about a pivot pin H for opening and closing the mold. The mold sections are removably mounted on plates l8 or brackets which are secured tothe arms i3 by bolts l9 and form extensions of said arms. The parts thus far described may be of conventional construction.

The mold cooling mechanism includes a pair of yokes consisting of castings 26 which are positioned directly beneath the plates 03 and secured thereto by bolts 2i which extend through openlugs 22 (Fig. 5) in the casting. Each of the castings 30 is formed with a duct 23 extending lengthwise therethrough and forming a part of an. air pressure line. Tubular arms 24 are secured to the casting 20 at opposite ends thereof by bolts 25. The arms Ed'extend vertically downward and each forms a casing in which is mounted a blower nozzle in the form of a cylinder 25 which is open at its upper end and in communication with the duct 23. The air pressure line includes a flexible hose 2B and apipe section 29 which opens into the duct 23.

The cylinder 26 is formed with a multiplicity of jet openings 31! extending through the cylinder walls, said openings being arranged in vertical rows. The cylinder is provided with a bottom plate 3| and is rotativel mounted for bringing one or more rows of the openings 30 into a position to direct air against the vertical exterior surface of the mold. This cylinder is conveniently rotated for adjustment by means of a rib 32 on the bottom plate 3|, and is held in adjusted position b means of a holding lug 33 adapted to engage any one of a series of notches 34 in the lower end of said cylinder.

The casing 24 in which the cylinder 26 is journalled, has a portion cut away to provide an opening 35 opposite the vertical face of the mold, said casing serving to close all of the outlets 30 except those facing the mold. The jet openings 30 are arranged in four vertical rows (Figs. 9 and 11) designated respectively, 30, 30 3 and 30. Fig. 11 illustrates the several positions to which the nozzles 26 may be adjusted. In the first position of adjustment shown at the left-hand end of the figure, all of the jet openings are shut off so that no air is blown against the mold. In the next position of adjustment, the row of openings 30- is opposite the opening 35, permittin air to be directed against the mold. In the next position of adjustment, two rows 3i! and 30 are exposed. In the next position, the rows 30, 30

and 30 are open. In the next position, rows 30 3 and 30 are open, and in the final position of adjustment, the row 30 onl is open. It will be noted that the provision of the row 30 allows for a variation in the position of adjustment with either a single row of openings exposed or two rows of openings. This single row, for example, may be shifted to any angular position throughout the range of the opening 35 in the casing.

The position of the blowing nozzles 26 relative to the mold, is accurately determined by means of a stop arm 36 formed as part of the casting 20. A stop block 31 attached to the arm 36 by bolts 38, bears against the vertical surface of the mold section I5.

Auxiliary blowers 40 (Figs.- 1, 2, and 3) are provided for blowing cooling air against the bottom surface of the mold sections. Each of the blowers 40 comprises a cap plate 4| mounted on the outer end of a hollow arm 42 through which air under pressure is conveyed to the blower. The cap 4| is secured to the arm by a bolt 43. A damper 44 in the arm 42 is manually adjustable for regulating the air supply to the blower. The cap 4| is formed with an extension 45 forming an air chamber which is provided with jet openings 45, preferably arranged in rows and spaced at short intervals, thus providing a multiplicity of outlets through which the air is directed against and distributed over the bottom surface of the mold. The arm 42 may form a part of the finishing mold carrier which is conventional in this type of machine as'shown, for example, in the patents to La France, No. 1,641,497, September 6, 1927,

and No. 1,739,845, December 1'7, 1929.

In operation, cooling air under moderate pressure is continuously supplied to the blowers. The construction of the nozzles 26 with their numerous jet openings, permits a large number of jets or streams of air at high velocity to be blown against the exterior surface of the mold. This blowing is continuous and is confined to the outer surface of the mold, blowing of air against the interior or molding surfaces being prevented. In this manner, heat is being continuously extracted from the mold with. suflicient rapidity to keep it at the required operating temperature while at the same time avoiding any rapid or excessive temperature changes of the inner glass contacting surfaces of the mold. The temperature changes of the inner mold faces are thus greatly lessened as compared with the conventional methods by which air is blowndirectly and intermittently against said faces. The blowers 40 blow cooling air against the lower ends of the molds only while the latter are in open position,

. thus counteracting the tendency of said ends to justable therein, said casings being positioned adjacent to the mold walls and each casing being formed with a longitudinal opening opposite the mold wall, said nozzles each being formed with vertical rows of jet openings extending through the wall thereof, means for rotatably adjusting the nozzle and thereby selectively positioning said rows of openings opposite to the mold wall and in register with the said opening in the easing, the said rows of openings including a group of rows, the spacing between the rows in said group being less than the width of the said opening in the casing, whereby a greater or less number of the rows in said group may be positioned opposite the opening in the casing, said nozzle including a, vertical row of jet openings spaced from said group a greater distance than the spacing between the adjacent rows in said group and at a less distance from the nearest row of said group than the width of said opening in the casing,

2. A blowing device comprising a cylindrical casing, a tubular nozzle fitted within the casing and mounted for rotation therein, said casing having a longitudinal opening at one side thereof, said nozzle having parallel 'rows of jet openings extending lengthwise thereof, the spacing between adjacent said rows being less than the width of said opening in the casing, a detent on the casing,' and holding means on the nozzle spaced circumferentially thereof at intervals corresponding to the spacing between said rows of 1 each said casing having a vertical opening" for become overheated by their contact with the ing and closing the mold, blowing devices comprising vertically disposed cylindrical casings mounted to swing with the mold sections and positioned beneath said plates, cylindrical nozzles mounted in said casings and rotatably adregistration with said rows of jet openings, said yoke being formed with a conduit extending therethrough and opening into said nozzles; and means for rotativel adjusting the nozzles and thereby selectively positioning the rows of jet openings opposite the openings in said casings.

4. A blowing device comprising a cylindrical casing, a cylindrical nozzle mounted within the casing and rotatably adjustable therein, the casing being formed with a longitudinal opening, the

"nozzle being formed with longitudinal rows of jet openings extending through the wall thereof, means for 'rotatably adjusting the nozzle and thereby selectively positioning said rows of openings in register with the said opening in the casing, the said rows of openings including a group of rows, the spacing between the rows in said group beingless than the width of the said opening in the casing whereby a greater or less number of the rows in said group may be posimounted to swing about a vertical axis for opentioned opposite the opening in the casing, said nozzle including a longitudinal row of jet openings spaced from said group a greater distance than the spacing between the adjacent rows in said group and at a less distance from the nearest row of said group than the width of said opening in the casing.

' NEIL M. WA'I'ERBURY.

ROGER C. TIT'IEL. 

